29
Special Adjustments
When starting the frequency inverter into a spinning motor, an E.OC fault
can be triggered because of the difference between the actual motor speed
and the inverter set speed. By activating speed search, the inverter searches
for the actual motor speed, adjusts its output frequency to match. It will then
accelerate with the adjusted ramp time to the given set value. During speed
search CP.3 displays "SSF". This parameter determines under which condi-
tions the function will operate. Parameter values can be selected individually
or any combinations.
Example: CP.26=12 means after reset
or
after auto-restart (E.UP).
Speed search
condition
Adjustment range:
0...15
Resolution:
1
Factory setting:
8
Note:
Enter-Parameter
Value
Condition
0
Function off
1
Control release enabled (terminal 16)
2
Power on
4
After fault reset
8
After auto-restart (reset) E.UP
100 Hz
f
t
Quick stop time
CP. 27
The quick-stop function is activated depending on CP.28. This parameter
determines the time needed to decelerate from 100 Hz to 0 Hz. The actual
deceleration time is proportional to the frequency change. The response
to overtemperature (CP.28) is disabled in the factory default setting. If it is
activated, the modulation switches off automatically after 10 s if the motor
is still too hot.
100 Hz
–––––– x actual deceleration time = CP.27
delta f
Adjustment range:
0.00...300.00 s
Resolution:
0.01 s
Factory setting:
2.00 s
Example: actual deceleration time = 5s; the drive should decelerate from 50
Hz to 0 Hz. delta f = 50 Hz - 0 Hz = 50 Hz
CP.27 = (100 Hz / 50 Hz) x 5 s = 10 s
